
Chapter 12. System maintenance and diagnostics 475
Figure 12-11 AMM BladeCenter LEDs control and status page
Light Path
Light Path diagnostics is a system of LEDs on the control panel and on your
system board (IBM BladeCenter JS43 Express has Light Path LEDs on both
boards). When a hardware error occurs, LEDs are lit throughout the blade server.
LEDs are available for many components, such as:
Battery.
SAS HDD (or SSD) disks, on both Base and MPE planars.
Management card on Base planar only.
Memory modules on both Base and MPE planars.
Expansion cards (1Xe and HSDC daughter cards) on both Base and MPE
planars.
The MPE planar has a special LED to help on determining the correct planar
where the error is happening. This LED is called “
Check card below”, and is used
to indicate that the problem is not occurring in the MPE planar, but in the Base
planar. This LED is also called “
Not me” LED.
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